The utility model provides a three -phase unbalanced load automatically regulated and reactive power compensator, transformer secondary output and load connection, transformer secondary output is connected with main incoming line breaker, the integrated alternate compensating capacitor group of intelligence includes be the three alternate condenser branch road of angle joint, every alternate condenser branch road of includes the alternate on -off switch and the condenser of establishing ties, every alternate condenser branch road is located respectively between the two double -phase lines, intelligence is integrated divides and mends capacitor bank and mend the condenser branch road including being three branch that the star connect, and every divides and mends condenser branch road and mend on -off switch and condenser including the branch of establishing ties, every alternate condenser branch road respectively with a looks line connection, star mid point and zero line that the star connect are connected, the integrated capacitor bank that mends altogether of intelligence includes the three condenser of mending altogether that is the angle joint, and the three output of angle joint is respectively through mending on -off switch and respective one looks line connection altogether. The utility model discloses balanced three phase loads, reactive compensation effect are better effectively.