An　electro-optic　Q-switched　multiwavelength　laser　diode　array　end-pumped　Nd:YAG　laser　without　temperature　control　is　proposed　and　demonstrated　in　this　paper.　Using　a　3.2kW　multiwavelength　laser　diode　array　as　the　pump　source,　a　lens　duct　as　the　coupling　system,　RTP　crystals　as　the　Q-switch,　and　an　end-pumped　Nd:YAG　crystal　rod　(empty　set　6x60　mm(2))　as　the　gain　medium,　the　laser　system　obtained　a　maximum　output　pulse　energy　of　72mJ　at　room　temperature　with　a　pulse　width　of　15.8ns,　a　repetition　rate　of　20Hz,　and　an　optic-optic　conversion　efficiency　of　11.25%.　Meanwhile,　the　output　energy　increased　from　69mJ　at　-40　degrees　C　to　78mJ　at　60　degrees　C,　with　an　energy　instability　of　less　than　10%　and　a　pulse　width　instability　of　less　than　15%　over　the　full　temperature　range　of　100　degrees　C.　The　divergence　angles　of　the　output　laser　in　the　horizontal　and　vertical　directions　were　measured　as　2.5　and　2.6mrad,　respectively.　The　work　the　authors　have　done　will　provide　important　references　for　other　researchers　to　carry　out　similar　research　studies.