Based on noncollinear optical parametric amplification in periodically poled lithium niobate (PPLN) which is realized by quasi-phase matching (QPM) technology, we consider the possibility of semi-noncollinear phase matching method between collinear and noncollinear geometry. With this configuration and geometry of all vectors in periodically poled lithium niobate, phase matching curves can be obtained. A sure grating period can always be found to satisfy the broad bandwidth optical parametric amplification (OPA) at fixed wavelengths of pump and signal from the phase matching curves. By tilting periodically poled lithium niobate-crystal's parallel grating a sure angle and keeping a sure temperature, numerical simulation with proper parameter shows broad bandwidth OPA at signal wavelengths of 800 nm and 1064 nm can be achieved.