  The Planck length is the minimum length which physical law do not fail. The
Dirac delta function was created to deal with continuous range issue, and it is
zero except for one point. Thus contradict the Planck length. Renormalization
method is the usual way to deal with divergence difficulties. The authors
proposed a new way to solve the problem of ultraviolet divergence and this
method is self-consistent with the Planck length. For this purpose a redefine
function ${\delta}_P$ in position representation was introduced to handle with
the canonical quantization. The function ${\delta}_P$ tends to the Dirac delta
function if the Planck length goes to zero. By logical deduction the authors
obtains new commutation/anticommutation relations and new Feynman propagators
which are convergent. This article will deduce the new Feynman propagators for
the Klein-Gordon field, the Dirac field and the Maxwell field. Through the new
Feynman propagators, we can eliminate ultraviolet divergence.
