Propane　(C3H8)　is　the　major　component　of　liquefied　petroleum　gas,　the　combustion　of　C3H8　and　ammonia　(NH3)　should　be　concerned.　However,　there　is　a　scarcity　of　experimental　data　on　NH3/C3H8/air　mixtures　to　validate　the　kinetic　models,　especially　at　elevated　pressures.　This　work　aims　to　provide　some　new　laminar　burning　velocity　data　and　investigate　the　premixed　combustion　characteristics　of　NH3/C3H8/air　mixtures　in　detail.　The　mea-surement　was　performed　at　various　equivalence　ratios　(phi　=　0.6-1.4),　ammonia　ratios　(alpha　=　20　%,　50　%,　80　%),　and　initial　pressures　(P0　=　0.1-0.5　MPa).　Besides,　five　kinetic　models　were　compared　against　the　experimental　data,　the　optimal　performing　model　was　used　for　numerical　simulation.　The　results　show　that　when　the　mole　fraction　of　C3H8　in　fuels　is　50　%,　the　peak　laminar　burning　velocity　is　about　28.5　cm/s.　And　the　peak　value　decreases　to　19.0　cm/s　when　the　initial　pressure　rises　to　0.5　MPa.　The　burned　gas　Markstein　length　decreases　with　the　increase　of　equivalence　ratio　mainly　due　to　the　remarkable　effect　of　the　effective　Lewis　number,　and　it　also　decreases　with　the　increase　of　initial　pressure　because　of　the　decreasing　flame　thickness.　C3H8　promotes　the　combustion　intensity　of　NH3,　which　is　reflected　in　the　enhancement　of　flame　temperature　and　radical　pool,　but　C3H8　has　no　obvious　effect　on　the　mixture　heating　value　of　the　NH3/C3H8/air　mixtures.　NH3　substituting　can　effectively　reduce　CO　and　CO2　emissions,　and　the　reduction　effect　is　more　significant　under　high　NH3　mole　fraction　conditions.