Abstract: A portable power saw guide system for properly aligning a power saw with respect to a board member at various angles thereby facilitating efficient and accurate cutting of the board member. The portable power saw guide system includes a main body having a first segment and a second segment, a receiver channel extending within the main body between the segments for receiving an elongate board member, a plurality of guide slots and blade slots extending traversely within the upper surface of the main body, and an alignment member attached to the lower surface of a support base upon a power saw, wherein the alignment member is slidably received by the guide slots. The first segment and the second segment of the main body have a height sufficient for the lower surface of the alignment member to pass over the upper surface of a board member within the receiver channel thereby allowing the cutting blade to sever the board member.