"Solar Flare Origin - critical analysis" Lev Pusti'lnik We analyze current approach to solar flare origin in 3 aspects: a. Pre-flare equilibrium state of current-magnetic structure above active region and its evolution to flare state, b. Possible reasons of stability loss with transition of system in flare state c. Flare energy release in turbulent current sheet and particle acceleration in this system. We show that standard consideration of pre-flare state base on potential fields with some force-free adds, generated by motion on photosphere level, is in evident contradiction with observational facts of the last years: fine structure of magnetic fields on photosphere level (with dominated part of magnetic flux concentrated in small part of area in strong field threads/ ropes with conserved fractal dimension) and fine structure of coronal magnetic-current structure based on numerous magnetic threads-arcs (observed in X-ray and UV). We show that observed configuration can not be considered as quasi-static equilibrium, but in opposite, is in very active state of dynamic equilibrium of ensemble of individual current-magnetic local element and strong interaction between them. We consider global current as control parameter, cause catastrophic transition of the system of currents into flare state and analyze possible role of external disturbances as possible triggers of flare process. We consider flare energy release in final .flare. state of current-magnetic system and show that observed extra high power of flare energy release demand existing of extremely thin turbulent current sheet (TCS). We show that, from other side, this TCS is absolutely unstable relative to dissipative modes, pinch-like modes and overheating modes. In result TCS must disrupt to numerous domains of .turbulent. and .normal. plasma with very high aand very low resistance, correspondently. This situation may be described by process of current percolation through random resistor.s network with dependence resistance from current of threshold like type. New equilibrium state of current, percolated through resistor.s network with current. dependent resistors lead to new state of dynamical equilibrium, controlled by global current value. This percolation process is base of well known effects of phase transitions from insulator to conductor or from conductor to superconductor and may explain different mysterious properties of flare process: sudden start of flare itself in large volume, precursors and pre-fluctuation preceded to flare state, power spectrum of amplitude- frequency distribution, power spectrum of accelerated particles in their energy.