The invention relates to a multi-source fusion power transformation topology circuit and a transformation topology method thereof. When the input is an AC power source, a first conversion switch S1 isconnected with an AC source VAC, a second conversion switch S2 is connected with a drain electrode of a second MOS tube Q2, and a first MOS tube Q1, the second MOS tube Q2, a third MOS tube Q3 and afourth MOS tube Q4 form a half-bridge synchronization rectification circuit; when the input is a DC power source, the first conversion switch S1 is connected with a DC source VDC, the second conversion switch is connected with an input end of a first energy storage inductor L1, and the third MOS tube Q3, the fourth MOS tube Q4, a first power diode D5 and a second power diode D6 form a staggered parallel Boost circuit. The method is advantaged in that AC and DC transformation functions are integrated, based on the staggered parallel Boost topological circuit, through function reuse of the switch tubes Q3 and Q4, in combination with the switch tubes Q1 and Q2, half-bridge synchronization rectification is commonly realized, not only can AC source power transformation demand represented by a nucleus power source be realized, but also the method is suitable for DC energy systems represented by solar cells.